Linking the pages of a website is done because search engines will be more aware of a site's presence when its pages are found at the other end of industry terms in anchor text contained with content at other locations. The total and quality of those links are factors that help promote rankings; when placed for SEO purposes they should be one-way links rather than reciprocal since reciprocal links are not any help in ranking brownie points and it is prohibitively time-consuming to administer a thousand of them. This is not to be confused with link exchanges; when you can...